Entering in U-boot prompt

[fpasino]

Hi,

I have recently acquired a i.MX 8M Nano EVK board and can't seem to start the U-boot prompt. During booting I press any key (on the keyboard) as instructed here, but the operating system starts anyway.

I have tried both the Android system preinstalled on eMMC and the Linux system installed on SDcard (imx-image-full-imx8mnevk.wic found here).

Attached is the Serial Debug log.

Thank you un advance.

[joanxie]

what imx8mn evk board do you have? lpddr4 or ddr4? nxp board or customized board?

"During booting I press any key (on the keyboard) as instructed here, but the operating system starts anyway."

>but refer to you logfile, your kernel doesn't start, so when you press any key, your board stuck as the logfile shows?

[fpasino]

The board is that.

I realised that the log was not complete, sorry, I have uploaded it again. It does not change whether I press the keys or not.

The Linux kernel start correctly.

[josephzhou1 · Accepted solution]

hi i saw your boot logs :

Fastboot: Normal
Normal Boot
Hit any key to stop autoboot: 0

the delay may be set to 0 second , thats why your have no time to press any key to enter u-boot command lah

solution:

pleaae goto your u-boot command and environment to edit , 

bootdelay = 10

it will delay 10 seconds to let your press any key to enter u-boot .

please try it out and let me know how it is work for u or not 

thanks all